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| author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2018-06-02 12:29:46 +0100 |
|---|---|---|
| committer | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2018-06-04 18:16:08 +0100 |
| commit | 61d5676b5561d61e3fdd9e88fc2b549b9b4df08f (patch) | |
| tree | e6ea7d93c2c290311a2a6f26e8104b6bab424b18 /drivers/gpu/drm/i915/i915_drv.h | |
| parent | 218b5000982b7c5e7433b86819be92f95984a1ae (diff) | |
| download | lwn-61d5676b5561d61e3fdd9e88fc2b549b9b4df08f.tar.gz lwn-61d5676b5561d61e3fdd9e88fc2b549b9b4df08f.zip | |
drm/i915/perf: fix ctx_id read with GuC & ICL
One thing we didn't really understand about the OA report is that the
ContextID field (dword 2) is copy of the context descriptor (dword 1).
On Gen8->10 and without using GuC we didn't notice the issue because
we only checked the 21bits of the ContextID field in the OA reports
which matches exactly the hw_id stored into the context descriptor.
When using GuC submission we have an issue of a non matching hw_id
because GuC uses bit 20 of the hw_id to signal proxy submission. This
change introduces a mask to compare only the relevant bits.
On ICL the context descriptor format has changed and we failed to
address this. On top of using a mask we also need to shift the bits
properly.
v2: Reuse lrc_desc rather than recomputing part of it (Chris/Michel)
v3: Always pin the context we're filtering with (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 1de401c08fa805 ("drm/i915/perf: enable perf support on ICL")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104252
BSpec: 1237
Testcase: igt/perf/gen8-unprivileged-single-ctx-counters
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180602112946.30803-3-lionel.g.landwerlin@intel.com
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index b5b09c8a327f..06ecac4c3253 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1951,6 +1951,7 @@ struct drm_i915_private { struct intel_context *pinned_ctx; u32 specific_ctx_id; + u32 specific_ctx_id_mask; struct hrtimer poll_check_timer; wait_queue_head_t poll_wq; |